Process for the production of fine soot suitable for the manufacture of pigments



. No Drawing.

stares" carat oasis EMERICH SZAIRVASY, F BUDAPEST, HUNGARY.

' rnocnss non THE PRODUCTION or FINE soo'r SUITABLE FOR THE 'M ANUrac'rUnn or PIGME'NTS.

To all whom it may concern Be it known that I, EMERroH SZARVASY, a citizen of Hungary, residing at Budapest, Hungary, have invented certain new and useful Improvements in Processes for the Production of Fine Soot Suitable for the Manufacture of Pigments, for which I have hydrocarbons.

finenessrequired for the manufacture of' pigments by the incomplete cumbustionof Such processes are however comparatively wearisome and uneconomical.

10" pass through chambers 'ciently high degree,

the better quality printing to the present invention the production of soot instead of being e ected by incomplete combustion, is eifected by the splitting up of methane by heat.

It i well known that if methane is caused heated to a sufliit will split up and deposit carbon. The freed carbonis .how ever deposited upon the heated surfaces, for the greater part in a' graphitic form, and in so far as soot is formed, it has not the fine-' ness which would render it suitable for use in the manufacture of pigments, particularly pigments. a

I have now discovered that the formation of sootv can be promoted and the fineness of the separated soot can be increased by diluting the methane, that is to be. subjected to the heat-splitting operation, with neutral According gases, that is to say, gases that do not pro,- 4

Specification of Letters Patent.

ing the mixture to a Patented July 5, 1921.

Application filed June 3, 1920. Serial No. 336,408.

'duce carbon, such as for instance nitrogen or hydrogen, and thus diminishing the'partial pressure of the methane.

- The soot produced in this manner is extremely fine so that it is suitable for the manufacture of the finest printing pigments, and owing to its extremely fine sub-division, that is to say, great covering capacity, it can be employed also with advantage as an absorbing or adsorbing agent.

A particularly effective means is the dilution with carbonic acid gas which is decomposed at the reaction'temperatureinto car bon monoxid 'and oxygen, combines with the carbon to form carbon monoxid and thus producesa considerable increase of volume during the reaction.

I claim:

1. The process, which consists in diluting methane with a neutral gas and subjecting the mixture to a heat treatment, methane is splitup.

2. The process, which consists in diluting methane with a neutral gas that does not deposit carbon and subjecting the mixture to a heat treatment, whereby the methane is split up.

3. Theprocess, which consists in diluting methane with carbonic acid gas and subjectthe methane is split up.

In/testimony whereof T have signed my name to this specification.v

, EMERICI-I s zAnvAsY. Witnesses:

CHAS. MEDQYES, EUGENE ISZIABSANYI.

which likewise whereby the heat treatment, whereby 

